I’ve had a quad for a while now but have never used it because I’ve never used an oscilloscope. I have a need for it now and I’ve realized that it’s not the most intuitive tool, at least not to me. If there is a set of tutorials or some sort of guide to this device, or oscilloscopes in general, that you can recommend for an absolute beginner please let me know.
What I’m trying to measure is a diy fuel injection ecu VR input vs output signal: diyautotune.com/tech_article … _index.htm. Unfortunately I’m not sure what the settings on the DSO should be to measure this. I got something readable but the y axis of the waves were so short that I really couldn’t make any qualitative comparison.
How would I expand the wave forms , both in x and y, so that they aren’t little bumps in the middle of the screen?
Thanks
Change the scale of the respective inputs (chA and chB)
Thanks for the quick reply…change the scale of the respective inputs…how do I do that? I’m sorry I’m a total noob 
Hi jpfbrown,
even as a noob (which I am as well) you should have found out what this DSO Quad shows on your screen - it is 2 dimensional and that is what a wave is–> 2-dimensional
a two-dimensional graph of one or more electrical potential differences using the vertical or ‘Y’ axis, plotted as a function of time (horizontal or ‘x’ axis)…
http://en.wikipedia.org/wiki/Oscilloscope
You have to scale means, that you have to change
- either what you see on the screen as --> DC ?.?V (for example DC 0.5V) or
- the other component of a waveform --> ??uS (for example 50uS)
And it is not an easy goal to fid the right buttons on the Quad to get, to where this values can be changed:
- if you turn on the unit,
- press the left of the trigger switches down and the CH(A) should blink - a blinking value can be changed by triggering that switch left or right.
- Pressing that switch again you move to the next value and can change it as just mentioned (pushing the trigger left or right: DC or AC)
- Pressing that switch again, you come to the point, where you want to change the vertical scale of the voltage displayed
The other axis on the screen (for the time) can be changed if you push the right triggerswitch either to left or right until you see the above mentioned value blinking (AUTO/NORM…) and again push the button down and change the value for the timebase and see how the wave expands or shrinks.
This is just a very short instruction, to help you find the values you want to change -navigating has to be practised over and over again - and there is much more you can play around and find out on this device.
Thanks for the info, much appreciated. I sat down with it early this morning determined to figure it out and I fumbled my way through to to the same solution that you’ve presented, your explanation just confirms that I’m on the right track.
Thanks again